public static void LastErrorHasExpectedValue()
{
// Default (same behaviour as SetLastError=false)
{
int expected = Marshal.GetLastPInvokeError();
SetLastErrorNative.SetError_Default(expected + 1, shouldSetError: true);
int actual = Marshal.GetLastPInvokeError();
Assert.Equal(expected, actual);
}
// SetLastError=false
{
int expected = Marshal.GetLastPInvokeError();
SetLastErrorNative.SetError_False(expected + 1, shouldSetError: true);
int actual = Marshal.GetLastPInvokeError();
Assert.Equal(expected, actual);
}
// SetLastError=true
{
int expected = Marshal.GetLastPInvokeError();
expected++;
SetLastErrorNative.SetError_True(expected, shouldSetError: true);
int actual = Marshal.GetLastPInvokeError();
Assert.Equal(expected, actual);
}
}
public static void ClearPreviousError()
{
// Set the last P/Invoke error to non-zero
int error = 100;
Marshal.SetLastPInvokeError(error);
// Don't actually set the error in the native call.
// Calling a P/Invoke with SetLastError=true should clear any existing error.
SetLastErrorNative.SetError_True(error, shouldSetError: false);
int actual = Marshal.GetLastPInvokeError();
Assert.Equal(0, actual);
}
